Critical Current in the High-T_c Glass model

TL;DR

This paper demonstrates that the high-T_c glass model can account for the critical current behaviors observed in high-temperature superconductors, revealing anisotropic critical currents and explaining near-isotropic behavior.

Contribution

It introduces a novel application of the high-T_c glass model to explain critical currents, combining two approaches to show anisotropy and isotropy in high-T_c materials.

Findings

Critical current densities are strongly anisotropic.

The model predicts nearly isotropic critical currents despite anisotropy.

The approach links microscopic glass behavior to macroscopic superconducting properties.

Abstract

The high-T_c glass model can be combined with the repulsive tt'--Hubbard model as microscopic description of the striped domains found in the high-T_c materials. In this picture the finite Hubbard clusters are the origin of the d-wave pairing. In this paper we show, that the glass model can also explain the critical currents usually observed in the high-T_c materials. We use two different approaches to calculate the critical current densities of the high-T_c glass model. Both lead to a strongly anisotropic critical current. Finally we give an explanation, why we expect nonetheless a nearly perfect isotropic critical current in the high-T_c superconductors.